Question About Stock Boost On R33 Gtr Vspec

[PhilGTR]

Hey guys,

Just following up on my post about the lack of power prob with my gtr 33 intermittently. WRXhoon said to watch the boost guage when it happens.

This is what i observed

On the stock guage, i have seen it reach higher than the 350mmHG mark when it was running well. So you have -7 | 0 | 7 (thats my impression of the stock guage). And i have seen it hit around halfway between the | and 7 before. At this point my calcs show just over 10psi.

However when it is running slow, it only reaches to 350mmHG point maximum. So at the | mark in the +ve zone which by calculations work out to be around 7psi.

My question is what is the boost level meant to be on for a 33 gtr vspec? i heard 10 or 11psi standard?

Also it sounds a bit louder too when this happens almost like there some air is leaking out when the turbos r sucking the air in??

Calcs obtained from http://www.proe.co.uk/units/

Help please!

[paulr33]

it sounds fine, vspec makes no difference, boost is same on non vspec

[PhilGTR]

it sounds fine, vspec makes no difference, boost is same on non vspec

So you are saying that a stock R33 gtr should run only 7psi approx?

[paulr33]

no i should be more like 10psi

[nitemare5]

no i should be more like 10psi

Reading off the stock boost gauge is not an accurate way of determining how much boost you are running anyway. It's best to fit an aftermarket item (like a defi etc.) to read the boost.